@MJ
i think, the best way u can do is to perform a system mentainance on ur comp,check if there's a virus, spyware, etc.. this can cause connection slowdown...also try cleaning ur registry,..or if not, try installing a fresh copy of windows, then do the tweaks again..smartbro said's that the connection to them is burstable, try finding a strong cgnal to them...about tweaking; like mr.CB said to his tips, not all smartbro user's will gain the assumed speed,after tweaking ..haha...like me...we are one of the unlucky one..thats why hindi ko n cnubukan ulit ung mga tweaks.,now my download speed is 100+ to 300+KB/sec at day time, and 500+ to 700+ KB/sec at night time...walang tweaks to...n-shock nga ako dahil ng-boost ng ganito...ginawa ko lang is, mentaine my system, akyat sa roof, hanap ng cgnal, tas check my AP's...haha..kakapagod...pero ganda naman ng result...