How to webcam with a service provider

[uktightsfan]

I'm a complete novice to all of this and need some help. I recently arranged a webcam session with a service provider who uses Skype on AW and booked a slot. After an aborted effort when I didn't confirm the booking in time, I rearranged for 10 mins later. This time I confirmed the booking, agreed to funds being transferred and clicked the call button. I then got a message from my computer to say that there was no software installed that could complete the action. I have Skype pre-installed on my computer so do not understand hat other software I would need. In the end I had to hastily cancel the boking to free the performer up for further bookings much to my disappointment.

Can anyone please advise me where I went wrong ?