unable to use skills

[realone]

guys something weird started happeing after the patch 8 days ago. Sometimes when im in a dungeon or in arena, my skills seize to work. the just stop, i can see everything that is going on,

 the party skills, the bosse's skills, i can type in chat, but skills just wont work.

Anyone got any clue what is going on? i had never had any problems, well not this kind of problem but any help would be apreciated

 

thnx