selenium user-extensions, selenium ide

selenium user-extensions, selenium ide

I use Selenium IDE.I needed if-else construction and I found a javascript
file. I used the file in IDE easily.However when I tried to use the file
with selenium rc, I followed the steps:
-Opened selenium.jar file and changed the user-extensions file(this file
is in core->scripts->user-extensions) with what I found(which includes
if-else functions) from internet. -I started selenium rc with the command:
java -jar selenium.jar -userExtensions user-extensions.js -htmlSuite
"*chrome" "linkofsite" "staj\Projects\SikayetTestleri.html" "result2.html"
-port 4445
-Selenium server started firefox but nothings happend...
I could not find the problem from internet.Thanks for your answers.