I'm using the ASIhttprequest in many projects but recently with each new project when I'm trying to add the ASIhttprequest classes I get the following error before using classes just when I'm trying to import them:

Build finjan of project finjan with configuration Debug

Ld build/Debug-iphonesimulator/finjan.app/finjan normal i386
cd /Users/Apple/Desktop/application/finjan
setenv MACOSX_DEPLOYMENT_TARGET 10.5
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.3.sdk -L/Users/Apple/Desktop/application/finjan/build/Debug-iphonesimulator -F/Users/Apple/Desktop/application/finjan/build/Debug-iphonesimulator -filelist /Users/Apple/Desktop/application/finjan/build/finjan.build/Debug-iphonesimulator/finjan.build/Objects-normal/i386/finjan.LinkFileList -mmacosx-version-min=10.5 -framework Foundation -framework UIKit -framework CoreGraphics -framework AudioToolbox -framework AVFoundation -o /Users/Apple/Desktop/application/finjan/build/Debug-iphonesimulator/finjan.app/finjan

Undefined symbols:
  "_CFHTTPAuthenticationIsValid", referenced from:
      -[ASIHTTPRequest attemptToApplyProxyCredentialsAndResume] in ASIHTTPRequest.o
      -[ASIHTTPRequest attemptToApplyCredentialsAndResume] in ASIHTTPRequest.o
  "_CFHTTPMessageApplyCredentialDictionary", referenced from:
      -[ASIHTTPRequest applyAuthorizationHeader] in ASIHTTPRequest.o
      -[ASIHTTPRequest applyAuthorizationHeader] in ASIHTTPRequest.o
      -[ASIHTTPRequest applyProxyCredentials:] in ASIHTTPRequest.o
      -[ASIHTTPRequest applyCredentials:] in ASIHTTPRequest.o
  "_CFHTTPMessageIsHeaderComplete", referenced from:
      -[ASIHTTPRequest readResponseHeaders] in ASIHTTPRequest.o
  "_kCFStreamPropertyHTTPSProxyPort", r
iphone objective-c xcode asihttprequest
Edit
Report