18LF2520 as PWM TIMER or LOOP? (Oshonsoft BASIC)

Hi,
Here's a program where I've joined a TIMER program which works and a SERIAL IN program that also works, but together they don't.

If the line with ################### is in the program, then the TIMER works, and if it's commented out then the SERIAL IN works. (Copy and paste '$1100,1200,1300,1400,1500,1600,?' into the HSERIN in the SIM)

Any ideas please?
Camerart