Ford 94 F250 manual transmission won't go in to gears?

[Martin G]

Hello I have a problem with my Ford, my 94 F250 5.0 It's giving me a headache and some! My 5 speed manual transmission is not doing what it's supposed to do, I have over 150000+ miles in it and lately the transmission started to make a funny noise and it was very difficult to get the gears in, , so i decided to get it fixed I decided to replaced the concentric slave cylinder, the master cylinder, the flywheel, the clutch, the pilot bearing and all the gaskets necessary, and I did but when I put the transmission back on It just would not go in to any of the gears, the clutch seem to be working fine I press on the pedal and it activates just fine and the noise is gone but it just wont go in to any gears ........am I missing something? I followed all the steps that my haynes repair manual indicated and I just don't know what happened??? I was able to shift the gears fine when truck was turned off but now I can't... not on or off .............please help Thank you! any comments are very well appreciated