I have laready been reinstated by college before. Now I am in the same problem again. I don't what should I do. I went to an advisor and asked for a new i20 but she told me this may be alonger process and I can be denied by the immigration. Please help me out..

Reinstatments are very dependent on the facts of the case. Most are not approved, a second one is even less likely to be approved, but, if the DSO agrees, then file it.