You need to remove the timing belt cover if you didn't. It's the cover that goes over the cam gears. There are 4 bolts. Then remove it to one side to permit removal of valve cover. You can't remove the whole thing because the engine/transmission right hand mounting.
don't mean to insult you...but did you remove the spark plug boots? Because if you have the upper front cover off and the spark boots off and all the bolts from the cam cover, it should come off easy...there are quite a few bolts on that cam cover, so double check that you got them all.