Is the same, you can try
http://promobile.md/en/
1.Create an account
2.exit from your account.
3. add to cart a product
4. try to buy it with an existing account
and you will get the error.
Hello! You mark the post with error Unable to send login information as SOLVED, but it isn't Solved, I use now 1.5.6.2 which was the latest version, until march 2014. And the problem persist for a 1-2 months.