Ok so I HAD the same problem... tech support didn't do any good yesterday, and today I solved my problem..
I had an issue that the VM wasn't listed at all and I could only log onto the Mac directly. Our setup is we have an office manager that uses the mac with a VM for quickbooks, other personal would like to check into the VM to do some maintenance. So following the process for creating a VM and installing all the software everything is going well.
This is where it goes wrong:
Parallels seems to want to store all Virtual Machines in your /usr/Documents/Parallels/ directory. This directory is unique for every login or account on the mac. the VM didn't exist under my account on the mac. So I had to change my login on my mobile device to our manager's login to see the VM. Not the Parallels account, just the login to the Mac. I assume that I could copy the VM to my account, however then you have two different VMs.
Please suggest to Parallels to have a shared VM directory that all users can access including the mobile users.
Probably for advanced users, you can create a pointer to a common directory and Parallels would know the difference, might cause an issue if running more than one instance of the same VM through two different accounts.