always log out at first time

[metalista28]

wen i open my forum and log in.
wen i click the thread it will log out. .
how can i fix this probs mate?
anyone can help me?

 

[Hoxxy]

Do you have vBSEO installed?

 

[mmmxiv]

Could be a problem with your HTTP Headers and Cookie Options

 

[metalista28]

i think not yet.
i cant remember if i install vBSEO.

where can i find vBseo?

 

[metalista28]

Could be a problem with your HTTP Headers and Cookie Options

can you give me a step to fix it?