Error 12029 is a firewall specific error which don't let you to use Legalsounds Download Manager. In order to resolve this error, you can try the following steps:
If you have Windows XP or bellow:
- go to your Start button and click on Control Panel
- click on Windows Firewall and then on Exceptions
- add Legalsounds Download Manager to your list of programs and press ok
- reboot your computer
If you have Windows Vista or above:
- go to your Start button and click on Control Panel
- click on System and Security and then on Windows Firewall
- on the left side you have a tab named Allow a program or feature through Windows Firewall, click on it
- check your program and reboot your computer
