When I vacuum the floor dirt falls out on the floor

There is something restricting the wheel carriage assembly from moving properly. It could be dirt, wear or its out of whack a little. Inspect it closely to try to pinpoint the problem

You should find a large button or flap on the floor tool. This is usually spring loaded and needs to be OUT. This should then let air in to drive the turbine which drives the spinner.
Check out Vacuum Cleaners Upright Hand Stick Canister Vacuums Dirt Devil

Without specifics of Model, I can't tell you how. There are no clog ports in Dirt Devil vacuums. Usually a hose has to be removed to unclog.

you can replace the lid

Information on the Dirt Devil MCE5500 Floor Keeper Upright Wet/Dry Vacuum can be found here:

http://www.dirtdevil.com/products/details.aspx?id=MCE5500#parts

Use the link to download the Manual for the complete operating instructions.

Refer to http://www.dirtdevil.com/products/details.aspx?id=MCE5500 for the manual.

From the looks of the manual it's just for flat floor surfaces (vinyl, lino, tiles, etc).

Even though the brush is spinning, you probably need to replace the belt because it is stretched. It is probably slipping on the beater bar. This is normal and you shouldn't be alarmed. There is nothing wrong with your vacuum. :-)

Jim

High, its blocked up. Check by the brush and all hoses

Above the clear bin (canister) is the cyclone, and on top of that there's a handle. The whole bin-plus-cyclone assembly is released from the rest of the machine by grasping the handle and releasing the button that is on top of the handle where your thumb naturally falls. The trigger on the underside of the same handle releases the base of the bin (on a hinge) so the waste falls out.
You need to be careful not to squeeze that trigger until the bin is wherever you want to get rid of the waste, or else you'll end up with it all back on the floor!
You can empty the waste directly into a trash can, or enclose the bin in a plastic waste bag before releasing the waste.  After, make sure the base is properly re-secured before re-fitting the bin to the machine.  You can wipe the outside of the bin with a damp cloth.  If you wipe the inside (not necessary, but sometimes nice) make sure it is completely dry before closing the base.
I hope this helps.  I value your feedback, so please remember to rate this response.
Good luck!