I have passed on the qf 4.0 in Jan 2008.

I took a drug test friday and I used qf 4.0 and I have not heard from the employer are the MRO I am suppose to start to work tomorrow. Have anyone heard of someone being neg with QF 4.0 the last 2 number on the batch where 08 I bought it at the same location (Headshop) However this test I took on friday was a 10 panel would that make any difference

Someone please respond to me