CONTENT SERVER 6.40 BAD REQUEST

i have a IDES ERP EHP7 system

i recently installed Content Server 6.40.

When I try to access the http://<fullhostname>:1090/ContentServer/ContentServer.dll?ServerInfo ,

i get the "bad request error.

with the RSCMSTH0 program test, i get the http 401 error.

when i try t code CSADMIN, its asks for 800 client id and password.

I have given full control on the contentserver folder, and checked permissions for content server and cache server.

Any help would be appreciated