B1 Visa, while L1B is valid

[am36889]

All,

I initially worked with Employer A, where I had my L1B visa. I moved to another Employer 10 months ago. My current employer is processing a B1 for me, where as my L1B is valid till Nov 2010 as per my passport.

My question is, will my L1B be automatically canceled, if i get the B1 visa or my previous employer should have canceled it?

I have my B1 interview in 2 days. kindly help

thanks a lot

-Archana