to be honest mate , when aslain puts mods into modpack he tests them on his pc and checks every mod works with each other , if everything works the way it should and gives him no errors then he releases an update . this is time consuming.
all pc/laptops will be completely different to aslains set up so sometime u will experience an error or a mod not working . you have to give him more detail of the problem so he can investigate himself hence y he needs logs etc
which he has done loads of times for others and then eventually finds the problem and then he posts what to do to rectify whats wrong .
remember this isn't his job he does this off his own time , just show a little respect to him and he will try to help u out