1st - Those 300 free minutes will probably be to landlines in certain countries, and maybe to cellphones (just USA i think). I doubt that you get any free calls (over a minute) to any landline/cellpohone numbers unless you pay. I suggest you try making the calls from the PC first, using the officila VOIP software, and once you get it all working then try setting up Furikup to work with it.
2nd - It's well known that VoIPCheap and similar (VoIPStunt, VOIPBuster ... all of them are the SAME company) cause problems with Furikup, and that is the reason why it is stated in the instructions that it is NOT recommended to use any of these SIP providers.
3rd - Unless you post any logs... it is pretty unlikely that any of the developers can help you out. How to make logs? Read the damm instructions
