Internet drops after clicking on the launcher crossfire

Z8Games Hello guys I have a question about crossfire
every time I click the launcher to coxenão the crossfire with the Internet goes down, and only returns after rebooting my modem
and when I return to click on the launcher drops again, click on the launcher = crossfire go without internet.
what do I want to play crossfire.

Sorry this text translate via Google Tradutor.
i´m Brazilian Player...