Higher stakes on Prima

[ObnxNole]

I've been playing on Prima for about two months and done very well at the lower stakes tables($2,$4...$2.50, $5.00 & $3,$6). My bankroll(14K) is large enough in my opinion to play the higher limit tables but it seems like every time a try to move up I end up losing on the session. I was wondering if anybody is profitable at the higher tables and if so which ones. Thanx.