I'm sorry that your client is having trouble with the links. Can you tell us more:
Yes I am able to open them myself .
The client says it just comes up a blank screen.
Would you mind sharing one of those links with me? I'll contact you via Private Message.
I suspect that his (her?) home network is somehow blocking access to our servers.
One other question: What operating system and browser is your client using? Does your client have another computer that s/he can try it from?