Go to the RSLogix Emulate 500, Click on the HLT button, then Download your program, this should break the looping. You also need to verify the entire project, you have some shorting branches in file 20. Shorting branches are not allowed. If you want to do away with the contact that has the shorting branch, first, Click on the lower left corner of the shorting branch, then, Right Click-> Delete. Next , click on the contact, Right Click-> Delete. Repeat as necessary.
Forcing the input won't work unless the Forces Enabled is on, try Right Click->, then, Toggle Bit instruction instead.
PS:
Please note that all your JSR rungs are at the Top of LAD2 not at the Bottom just before the END instruction in the file you posted.