Cannot take two levels of Warlock while on the Heart of Wind

[geoffhanna]

I am building a multi-class bard/warlock except when I try to take a second level of warlock, I am instead directed to the DDO Store which tells me that I am not eligible to buy that class.

Since I am not done with levels I cannot get off the ship. There seems to be no way around this other than to delete the character and start over.

I tried this taking one level of bard and then warlock. I tried it with three levels of bard and then warlock. I was able to build a pure warlock last week so this seems to affect only multiclasses.

[Edit] I cannot take the second Warlock level in the test dojo either. Is multiclassing Warlocks supported?