About month ago i buy license and win some auctions ander my main account. But also i have brothers account from USA - i make some bids when he is busy. Day ago i turn sniper to item 110450495188 and maximum bid 1160 USD - but sniper not bidding, as before and i lost this item, it has maximum bid 990 USD. So what is wrong i made? How to use myibay under two eBay accounts - or this will work only under name, that was myebay registered to?

Welcome to our forums.

Your snipe worked, but this account did not meet seller's requirements so your bid was not accepted.
If you open your Snipe page (the page where you set your snipe amount, time and see detailed info about the item), you can see the following in "My Status" field:
"Your PayPal account is not linked to your eBay account".

Please check this forum thread for more information:
http://www.myibay.com/forums/viewtopic/647/your-paypal-account-is-not-linked-to-your-ebay-account/

Next time you can put the lowest possible bid to see if it will go through first and you meet seller's requirements.