I Can't Buy Items

Can you help me?

Yup	0.0%	[ 0 ]
Nope	33.3%	[ 2 ]
POLL WHORE <3	66.7%	[ 4 ]
Total Votes:			[ 6 ]

[Eslen]

Yesterday I bought a few items, but today I tired to buy a red belt, but when I clicked buy, and the page loaded, it said "User not authenticated" I've heard that it is resolved by clearing your cache, but I'm not sure how, or where to do that >.<

[MemoriesOfThePast]

try siging on and then of.