Cannot Set Vendor

[Fraser12a]

I'm trying to set the vendor of my store but coming up against a lot of roadblocks. I've tried all of the solutions I can find on here and none seem to work.
If I need to edit something in PHPmyadmin i'm not sure what to edit, there doesn't seem to be anything obvious.

I'm using:

VirtueMart Version:
VM-3.0.18
Joomla Version:
joomla 2.5

Site is power-supplements.com.

Thanks

[jenkinhill]

Set vendor userid on VM Tools/Tools /Migration tab - at the bottom of the page.

https://docs.virtuemart.net/manual/tools-menu/70-tools-migration.html

[GJC Web Design]

And to set as vendor the "user" must have logged into the VM frontend at some point to establish a profile
If not the setting will not take...

[Fraser12a]

When I type in my username and click the ''set store owner'' button the page refreshes with nothing in the box. Am I typing in the right userid?

Is it the User ID from the joomla admin login?

[jenkinhill]

The ID is in the rightmost column in the VM Shopper list  (it is the same as the J ID, but the vendor must also be in the shopper list.

[GJC Web Design]

a number!

[Milbo]

And to set as vendor the "user" must have logged into the VM frontend at some point to establish a profile
If not the setting will not take...

or must be stored at least one time in the BE as vm user.