You are using an iPhone 4 and you coincidentally updated to iOS 6.1.3, which cannot be jailbroken at the moment. Since you saved the SHSH blobs you think you can restore by doing a replay APTicket attack with TinyUmbrella or Cydia. Sadly iTunes shows errors like 1600, 1601, 1602, 1604 etc.
If you have an iPhone 4s or iPhone5 you can stop reading here. This article will not be able to help you. The iDevices with an A5 CPU or later cannot be downgraded with replay attacks at the moment. Continue reading