Im stuck at my limits and im not really learning anymore?

[sweeng8]

Hi,
I am a regular player at 1/2 NLH games and make a small but regular profit at this level, playing pretty much every day. Despite this however, Im starting to feel a bit frustrated at not really progressing anymore. For the last couple of years I have lived and breathed the game, read all the books, all the forums, etc. I play most days as much as I can. I feel like im a very decent player, but cant quite seem to make a step up to higher limits.
When I have played 2/4 in the past I dont do bad by any means, but I cant seem to have nearly as much success at lower levels, and feel like im more dependtant upon the cards and varience than anything else.

Has anyone else had this problem and is there away around it? I know when I make mistakes, but other than cutting out the few errors I may make Im stuck as to how I can beat the higher level games.
Any thoughts?