Trouble going in 5-6 after Mcleod install.

After I installed my Mcleod I started having trouble getting it to go into 5 and 6th gear. It will work sometimes if I shift extremely fast from 4th to 5th then to 6th, but the majority of the time it just grinds and won't go.

I already tried adjusting the master cylinder but it didn't change anything.

Any Ideas?

Anyone?