How desperate do you need a job?
It's a good idea to learn other languages anyway. It expands your knowledge and even if you never use it again, at least you know it and can put it on your resume.
I hated learning ASP and here's why:
although there were some sites out there with forums and such, the information on them was not nearly as good as what I get here or in alt.php on usenet.
the syntax is so different that just doing little things took me a lot of time to debug because I was looking at it as a PHP/Perl/C++ developer. It is not like these languages at all.
It doesn't have built in encryption, I had to search out and find a free script that did it for me. And it was long in code. With php I just call md5 or crypt and that's good for me.
There are some other oddities that took me a while to work out.
Like I said though. Learn it if you have the time, just so you have tried it and can say why you don't like it.