Login issue using nop commerce

Hello,
I am having problems with nop commerce on my site, I have used this e-store a few time with no issues, am wondering if I missed something in the server setup? I keep getting kicked out when I try to change the admin user and password.
any help is great..
thanks

 

Do you have a URL and a test account we can use? This way we can simulate the test on our end.

 

I dont have a test, I set it up live... I can message you the site