It appears you're using a non-authenticated "cracked" copy of Download Accelerator Plus (DAP). The software you are using is an outdated DAP version that has been tampered with by hackers and then repackaged.

Use of such non-authenticated software from an unidentified source poses a threat to your safety.

Just a couple of months ago, users of a non-authenticated, "hacked" version of MS Vista sadly realized that their "hacked" version included malicious code.
(see The Register article)

We strongly recommend that in order to ensure your safety and smooth usage, you get an authenticated copy of DAP available on www.speedbit.com and enjoy full service of updates and VIP support from SpeedBit.