How to do remote debugging in CRM4.0 for IPC

Hi Gurus,

I am using NWDS for my custom IPC user exits, and now during the creation of sales order i want to do debug my custom code. For this I followed the below steps:

1. I set the parameter PRC_RFC = 'X' in my user parameter.

2. I create a sales order and after entering one product and some quantity i pressed enter .

3. I am getting debugger , Here I am pressing F5 several time (around 15 times), but I am not getting any popup where I can enter my port number.

I tried to see the options in SM52 but my CRM system is not having SM52 transaction.

Any body of you can suggesst me where I am doing mistake or do I need to follow some other appraoch in CRM4.0.

quick response with the answer will be rewarded by good points.

Thanks and regards

SAndeep