Regular clicks and Gaps - CPU load too high?

Hello

this is slightly URGENT

Ive made a metasurface patch that im running with UA-1EX soundcard.
Mic input - Joystick mapped to mouse using Controllermate (on os x) and Joymouse on Win XP.

Ive tried two different laptops One DELL inspiron mini 10 running os x and one Sony Vaio running XP and both are giving me audio dropouts:
About twice a second, in a regular pattern, if I move into the top right part of my meta surface or if the input into the mic is loud (not peak).

Is this a CPU overload? or not enough ram?
The CPU monitor in AM never goes above 29%

the patch can be found here:
vahakn.co.uk/x/f4mh_x.amh

Can anyone see whats going wrong?
If my computers are under powered?
Can I get a .log file that will tell us whats up?

Thanks

Vahakn