Brian,
Nice 1st. luger...congratulations !
You might try inserting another magazine. You might be surprised that your toggles will stay open with another magazine...
The follower button on your current magazine might not be coming up all the way to its upper position. I think the button is what is actually supposed to make contact with the hold-open lever to engage it when all rounds are expended...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />