What legal action is available to me regarding a recent retailation firing?

My prior employer offered a 401K plan. Late Aug, 09 I noticed that the last 401k allotment was posted June 15, 09. Every employee who participates did not have thier amounts taken from their checks put into the account between 6-15-09 and 8-15-09 about 5 payments.

A DOL audit is in process. I asked over and over our 401K money as it is still not in our accounts. Mid Oct 09, my boss got into my face and screamed at me for asking and stirring up the pot in front of other employees.

Last week when he stated that everything is ok. He wanted to change our work hours in retailation and then I questioned in a staff meeting when the $ into our 401k Accounts. He got very upstet and said I was terminated. I said he could not fire me for that he did then said work was not up to par