Error while checking in and storing: C:\Documents and Settings\user\Desktop

Hi All

I am getting the following Error while checking in original to Content Server

"Error while checking in and storing: C:\Documents and Settings\user\Desktop" Message 26253

I have checked the following settings

-Settings in OAC0 and OACT are fine

-Settings in CSADMIN is fine

-Settings in DMS SPRO - in dc10, dc20- everything fine

-Authorization issues are not there

I saw many queries regarding the same in SDN, but could nt find an exact solution to the prob

We have installed Content Sever 6.40

Please suggest

Regards

Aby