"GPRS authenticaion failed" "Connection not available"

[ThaTrice]

Hey, my GPRS was working fine yesterday, but today when i try to connect to it i get first a screen that says

"GPRS authenticaion failed"

And then a screen that says:

"Connection not available"

any way i can sort this out? Thanks.

[petrosg]

Try again, and again.
It will work.