IPHONE DEV - Getting thread Exception with - (void)webViewDidFinishLoad:(UIWebView *)webView{ Method

Question

Hi, Iam using - (void)webViewDidFinishLoad:(UIWebView *)webView method, to track every time my webview finishes loading and am loading a different page, depending upon the URL. Iam extracting a keyword word from the URL, to identify which page has been loaded. The problem is while am running this in a "if else" loop, It throws a obj_msg_ exception and the screen freezes. In the console window i see "Switching to thread 0x00987". Anyone been through a similar scenario pls help. :(

Thanks in Advance....... Rajesh