my excel file hang

hi,
i wrote an excel file contain macros.
by changing value in sheet"INPUT2" cells f4 and f5, and checkbox near them, sheets (CMT,CMT2,CMT3,CMT4) become visible and hidden.

but most of time when i go to any "CMT" sheet that is visible, my excel file hang and not respond,
why?can anyone help me? where is the problem with my file?

I noticed that CMT3 (the only one I looked at) was "protected", and didn't let me access any cells. However, I could switch to other sheets. When a worksheet is protected, the TAB key should let you navigate to cells that accept data entry.

Lewis

this is the password:
meisam3521202127