"Your Bitcoins could not be sent because the amount can't be smaller than 0.01 BTC"
You must be using Instawallet. You're stuck with em till you get more. Just don't lose your link and they'll still be there when you're ready to dig back into them.
I usually grab .01-.02 a day from freedigitalmoney.com Just get in to where you can click on the radiumone tab and click on all the 8 Bitcoins (microbitcoins lol) or less. Any others will leave you cleaning crapware off your computer the rest of the day.