Hi Peter and Mac.Sorry I havent come back as Ive been away for a couple of days

Peter Ive already unchecked fast generation but still have the problem
Ive also done Geekbench and it was low about 900
Im pretty sure its this thats causing the problems as my computer is quite old now
and Im going to have to increase my RAM but by how much I,d be interested to know.Thanks

Mac.As mentioned to Peter I suspect its my RAM thanks again

Just a thought.when I do playback on biab and look at the processor in task manager it rises to 100% and the whole track judders.Then after awhile it seems to right itself the cpu usage goes down to about 35-40% and plays ok.If I then play another track it starts all over again with large amounts of juddering

AMD Athlon 7550 dual core
processor 2.51 ghz
1 87 gb ram
windows 7 Ultimate
yamaha rev 500 effects
tacam DP-24 DAW
Samson Resolv NF monitors
Yamaha PSR-620 Keyboard
Fender semi accoustic guitar