Convertible top problems?

Im havin problems w my convertible top in my 01 cobra it does still go up and down but it takes about 4 secs with the top motor going for it to start moving. and it makes a strange knock sound when it first starts going back and for some reason the drivers side of the top is slower than the passenger going up and down like its getting caught on somthin. tryd adding fluid but diddnt bleed the lines still does it. anybody have an idea what the problem could be and how to fix it?