Cst reimbursement claim by stp unit

A STP unit gets itself registered with Central sales tax authorities on 2/7/12. It has procured materials for its export purpose from another state. It has received the goods on 2/7/12 and the invoice dated 28/6/12. It has made payment to the vendor through cheque on 2/8/12 with proper money receipt. Can the unit claim cst reimbursement with STPI ??