Remove this check as it prevents from Bit.ly Pro Custom URLs.

modules/Bitly.pm

@@ -71,7 +71,6 @@ sub shorten
         # If successful, decode the content.
         my $d = $response->decoded_content;
 		chomp $d;
-		if ($d =~ m/bit.ly/i) {
         # And send to channel.
 		privmsg($data{svr}, $data{chan}, "URL: ".$d);
 	}
@@ -79,11 +78,6 @@ sub shorten
         # Otherwise, send an error message.
         privmsg($data{svr}, $data{chan}, "An error occurred while shortening your URL.");
     }
-	}
-    else {
-        # Otherwise, send an error message.
-        privmsg($data{svr}, $data{chan}, "An error occurred while shortening your URL.");
-    }
 
 	return 1;
 }