I have a problem with the camera that it can't accept any memory card. it works only on the internal memory

Probably camera has it's own memory & it is full.
Look under settings for option to switch to SIM card for picture storage.

Delete the photos off the internal memory and remove the battery. this will reset it the factory setting and that should clear it up

try a new one and if that doesn't work ask for your money back

You need to format the internal memory with no card in the camera. Once it is erased, your card should work properly.

First, with no card in the camera, go into the menu and find "format"...follow the on-screen instructions to erase the internal memory. Then, insert the card and do the "format" thing again to optimize the card for the camera. Now, it should work properly.

The following information lists the type and maximum storage capacity of the memory card that each type of camera accepts.

EASYSHARE CX-, DX-, LS-Series Cameras accept:
DX3500, DX3600, DX3900: CF memory cards up to 1 GB
LS755: xD memory cards only
All other CX, DX, LS: SD memory cards up to 1 GB
EASYSHARE C-Series Cameras accept:
C300, C310, C315, C330, CD33, CW330, C530, CD40, CD50: SD memory cards up to 1 GB
C340, C360, C433, C503, C533, C603, C633, C643, C663, C703, C743, C875: SD memory cards up to 2 GB
CD43: xD memory cards only
All other C-Series Cameras: SDHC and SDHC UHS-1 memory cards up to 32 GB
EASYSHARE M-Series Cameras accept:
M590, M583, M577 TOUCH, M5370 TOUCH: MicroSD and MicroSDHC memory cards up to 32 GB
All other M-Series Cameras: SD, SDHC, SDHC UHS-1 memory cards up to 32 GB
EASYSHARE P-Series Cameras accept:
P850, P880: SD memory cards up to 2 GB
P712: SD or SDHC memory cards up to 4 GB
EASYSHARE SLICE Digital Camera accepts:
MicroSD and MicroSDHC memory cards up to 32 GB.
EASYSHARE V-Series Cameras accept:
V1233, V1253, V1073, V1273: SDHC, SDHC UHS-1 memory cards up to 32 GB
All other V-Series Cameras: SD memory cards up to 2 GB
EASYSHARE Z-Series Cameras accept:
Z610, Z650, Z700, Z710, Z730, Z740, Z760, Z7590: SD memory cards up to 2 GB
All other Z-Series Cameras, including MAX: SDHC and SDHC UHS-1 memory cards up to 32 GB
FUNSAVER FD-Series Cameras accept:
SD and SDHC memory cards up to 32 GB
EASYSHARE ONE Camera accepts:
SD and SDHC memory cards up to 1 GB
Notes:
Most KODAK Digital Cameras are compatible with SD, SD/MMC, and/or SDHC memory cards.
Most current KODAK Digital Cameras are compatible with SDHC UHS-1 memory cards.
All KODAK Digital Cameras that are compatible with SDHC and SDHC UHS-1 memory cards use cards with Speed Class up to Class 10.
MicroSD and MicroSDHC cards with SD adapters can also be used in cameras that use SD or SDHC cards if the storage capacity criteria above is followed.
KODAK Digital Cameras are not compatible with SDXC memory cards.

reference: http://www.kodak.com/global/mul/service/index.html?reqURL=http://support.en.kodak.com/app/home/src/gosupport

http://support.en.kodak.com/app/answers/list/p/2/selected/true

Phone Number for Kodak is:

800-235-6325

or try get human below for more info on support:
http://gethuman.com/phone-number/Kodak/

Do you have pics on the internal memory? You must format the internal memory with no card in the camera. Then, format the card.

Are you trying to format the card in the camera? That's the accepted way. Go into the setup menu and find an entry for "reset"...try that. Try removing the card and battery...press all the buttons...insert the card and then the battery..try it. Remove the card and erase the pictures the camera says are in the internal memory.

Sorry that this answer is far too late to be of use to you, but it may help others searching for advice with the same fault. I only stumbled across your unanswered question by accident.

8GB is an SDHC card. Your camera was designed to use the earlier SD cards instead with a maximum 1GB capacity.

look into memory inserting slot if you see a bent pin, I doubt it, most likely something internal failed, as of now fixing the camera is not worth it unles Nikon fix it and most likely they will as this is possibly internal component failure, contact them and send it for a repair, they will give you estimate, if it is free or acceptable let them fix it if not garbage can will gladly accept it and move on.