Has anyone had this issue?

[Panzermeister]

For the past few months i hav been IP blocked on battlefronts site for unknown reasons. i have talked to theyre web guy several times but he does not know why and the blocked doesnt tell him why.I regularly run norton system mechanic and spybot to keep my comp super clean. I was just wondering if anyone else has had this issue and found a solution or if one of you tech saavy types and maybe give me some pointers as to why this is happening