Tender Vibes 18189-TX Crib: how do you put the crib back together...

Doesn't look like your model was recalled, but you could always contact the manufacturer to confirm since the baby's safety is your priority. Below is an article I found with the affected serial numbers.
Kolcraft bassinets recalled due to fall dangers Consumer Reports News: May 09, 2012 04:38 PM

The U.S. Consumer Product Safety Commission has issued a safety recall for certain bassinet models made by Kolcraft Enterprises Inc., of Chicago, Ill. The Kolcraft Tender Vibes and Light Vibes bassinets have locking latches which may fail and cause the bassinets to fall, possibly injuring a child inside.
The CPSC and Kolcraft have received seven reports of latches detaching from the bassinet frame. In one of those incidents, one infant received a bruised cheek when the bassinet fell from its metal frame and landed sideways on the floor with the infant inside.
Consumer Reports experts note in our buying guide to bassinets that for now, there are no federal guidelines for those pieces of infant furniture other than safety standards for such items as small parts and rough edges. So, a baby crib-which must meet federal safety standards-is the safest place for a sleepy infant say our experts. (For more information, see Crib alternatives to avoid and Safe-sleeping tips in Consumer Reports' Babies & kidssection.)
This current recall involves about 46,000 Kolcraft bassinets which were sold at mass market and independent juvenile specialty stores nationwide and online from July 2008 through May 2012. The recalled Kolcraft Tender Vibes bassinets include model numbers KB021-ARC, KB022-VER and KB039-CMR1 and the Kolcraft Light Vibes bassinet recall is limited to model number KB043-BNT1. (Model numbers are printed on a label located on the side of one of the metal frame legs of Kolcraft bassinets.)

It's easy. Hold the main skirt fabric and drop the pressboard support into the bottom with the feet/nubs down away from the inside. Now the metal frame drops in and next slide the hinged U supports outward. This raises the edges and gives height to the bassinet. The U supports either lock under a plastic clasp on the pressboard or sit into holes on the board. Now button down all the buttons around the interior or zip the zipper closed. Set it back on the frame and snap the bassinet to frame snaps on. Add the hood and baby's new, clean bed is ready for a lullaby. Good luck and you should be able to download a PDF version of the instructions from the maker. Just go to their site and search.

Attach bedding

I was looking at this bassinett on babiesRus, and almost all of the reviews mentioned the wheels. Those that were successful said that you really have to force them...to the point of fearing it will break!! Hope this helps!!

It is very difficult. My parents and I spent about 3 hours on it, and my husband came home and did it in about 5 minutes. You have to actually put the hard-wood board and frame part in the liner. You have to pull it really tight, and the bit of printed material with the Warning sign should fold from the outside in. This puts the ruffle part close to the top--but on the outside. The buttons will snap all around, and the strappy things on the bottom hook around that bottom basket part and snap. You will be able to see the wood before you put the little mattress back in. I really hope that helps--we were so frustrated.

Google 'Kolcraft' & there should be a customer service number listed... Call them & tell them what you need... They should be able to let you know if that part is still available, & all the details...
I had that bassinet when my son was born & I LOVED IT! Wish I still had the thing you need, but I gave ours away =(

BUT Good luck!

We have borrowed a Kolcraft bassinet but cannot figure out how to put the liner on it to completely assemble it.

It is very difficult. My parents and I spent about 3 hours on it, and my husband came home and did it in about 5 minutes. You have to actually put the hard-wood board and frame part in the liner. You have to pull it really tight, and the bit of printed material with the Warning sign should fold from the outside in. This puts the ruffle part close to the top--but on the outside. The buttons will snap all around, and the strappy things on the bottom hook around that bottom basket part and snap. You will be able to see the wood before you put the little mattress back in. I really hope that helps--we were so frustrated.

its says on the kolcraft web site on the instructions u cant take the top part off u have to hand wash it in the sink or tub i also had that same problem because it was giving to me from a family member and have some spots on it but i doesnt come off sorry

Kolcraft's website - www.kolcraft.com - allows you to order replacement parts, get instruction manuals, etc. and if it's not there, you can email thier customer service.