If it worked before and it doesn't work now and you didn't change anything then the place to ask is your host - Please find out what they changed - it is sounding like the sessions have to expire before you can login again - (sessions normally time out after 24 minutes)
is there anything i should i ask for specifically?
kim let me know if it works (deleting all history, cookies etc) .. if its IE you have to reopen it .. then try to login. if its firefox you don't have to reopen.