Error deleteing messages

At first I download all messages. Double check - inbox is empty.
Now send one message to my mailbox. Everything is ok.

$pop3->Open(); -OK
$pop3->Login(); - OK
$pop3->Statistics($messages,$size) - return 2 messages
$pop3->OpenMessage() + GetMessag - OK - i see two messages.
$success=$mime->Decode($parameters, $decoded); - OK i see two messages.
$pop3->DeleteMessage(1) - Error - Invalid message number 1
$pop3->DeleteMessage(2) - OK - deleted message 2
pop3->Close() - OK

Now i check the mail box - it is empty.

and everything repeats at the beginning - send new message -> $pop3->Statistics($messages,$size) - return 2 messages
$pop3->OpenMessage() + GetMessag - OK - i see two messages.
$success=$mime->Decode($parameters, $decoded); - OK i see two messages.
$pop3->DeleteMessage(1) - Error - Invalid message number 1
$pop3->DeleteMessage(2) - OK - deleted message 2

pop3->Close() OK

What is the problem?

Is seems that pop3 caches the laste message. I do not understant why. I log into my mailbox (via web interface) and the inbox is empty. But pop3 class returns the last message... But can not delete it because the message number is invalid - because the message is already deleted....

PLEASE IGNORE/DELETE THIS THREAD. The problem is NOT pop3 class related! I AM SORRY!