Well, if what you list above is ALL you did to prepare your inputs, you cann't use them for (RI-)MP2 calculations.
For conventional MP2 calculations with mpgrad you have to run mp2prep, for (RI-)MP2 calculations with rimp2 or ricc2 you have to specify the auxiliary basis sets. Please consult the docu or the tutorial for the detailed description how to do this.
Christof