Oh.... That sucks..
I had the same problem but i fixed it.
First, restart your computer and turn off firewall.
What i did to fix it, was redownload v88 folder, make sure i have everything in the right place and that the HSUpdate was 144KB instead of 154KB.
Then, launch soulms.exe from the v88 folder and go into settings and make sure its directed towards maplestory.exe in the right folder.
Then launch and it should work.?
If you can be more specific about problems you are having, I may be able to help you