Employment angencies commonly make these mistakes:
I once had an employment agency say the following to me:
Do you have experience with MSQL 7. I replied no but I have experience with MS SQL 2000, Oracle, Sybase, MySQL and Access. They said I'm sorry but if you don't know MSQL 7 you're not qualified. So I called back an hour later answered yes to the question and got the job. After getting the job I informed the employer of this and there were most gracious as they changed to an IT specialized employment agency.