Sorry about this but Skype has unexpectedly been turned off due to low quality forwarding, this makes our numbers work poorly and that is not the case
Microsoft ( which owns Skype now) also disabled the 3rd party API’s
If you’re not tied to them we highly suggest SIP, you get caller ID , its free and much more reliable
You can also use this SIP client ( refer to above post though)
Let us know if you have any other questions