Fix Iphone App Error

I have an iPhone app that is producing 3 wearnings and 5 errors and I believe they are all related to the same issue but I am not familiar enough with xcode to remedy the problem. There seems to be an issue inside the file “SA_OAuthTwitterEngine.o” Here is the error log.

lib/iSimpleTwitter/twitterApp copy/Classes/Libraries & Headers/OAuthConsumer’ following -L not found
Undefined symbols:
“_OBJC_CLASS_$_OAConsumer”, referenced from:
objc-class-ref-to-OAConsumer in SA_OAuthTwitterEngine.o
“_OBJC_CLASS_$_OAMutableURLRequest”, referenced from:
objc-class-ref-to-OAMutableURLRequest in SA_OAuthTwitterEngine.o
“_OBJC_CLASS_$_OADataFetcher”, referenced from:
objc-class-ref-to-OADataFetcher in SA_OAuthTwitterEngine.o
“_OBJC_CLASS_$_OAToken”, referenced from:
objc-class-ref-to-OAToken in SA_OAuthTwitterEngine.o
“_OBJC_CLASS_$_OARequestParameter”, referenced from:
objc-class-ref-to-OARequestParameter in

I am just asking for a fix for this error so it will compile properly.

I have attached the 2 SA_OAuthTwitterEngine files below. Perhaps this can be an easy fix for you.