I am an international student. I previously was on H4 and applied for a change of status to F1 on July 24 2013. I got my approval on Oct 15 2013. However "Valid From" on the approval notice is from Dec 06 2013. I got an internship offer starting Jan3 2014 and i want my CPT. Is this going to affect me getting a CPT? my international advisor is not helpful. Please help.