Bro the "X" appears when you're LAN (INTERNET) cable gets disconnected from your computer. Make sure the clamps tightly click into the LAN Card (That's where you put your internet wire). Good luck.
BTW, that doesn't lag your SAMP, that just stops it altogether.
IF you're unsure what is causing this problem, call a network administrator who may be able to physically correct any faults with the wire.
Are you able to use Internet on that computer while that red X appears ? That red X shows that the internet cable is unplugged or broken...
Ex-Army Member, Ex-Swat Warrant Officer 1, Ex-Pagati Member
If you need any kind of help with modifications or related issues with the Game, PM me Currently inactive in-game due to Study schedule, if you need me, you should PM me on forums.