Continued Requirement to Log In

Hey guys, Im on a proxy controlled by Astaro, and every time I try to browse the internet, Of course, it asks me to agree to the T&C and log in, HOWEVER, usually less than a minute later, usually because sometimes it takes a tad longer, others its a tad faster, but it always happens, it asks me to agree and log in again, It continues to do this no matter how many times i log in. It makes it impossible to stream a video such as a YouTube clip, and just standard web browsing it such a pain, I would like to know if this is a known problem, or if there's anything you can tell me from the little information i have provided ^^"
:confused:
I would appreciate any help you are able to provide me, and if there is anything you need to know just let me know and ill get back to you ASAP with the info!
Thanks
-CP