Ok, than you need to modify appstartupsec.ini file which will force iGO to run instead of Miomap. This file is usually located in:

\Program Files\Miomap\
or in
\Program Files\Navman\

or in ProcessMgr.ini file which is located in \My Flash Disk\Program Files\System\

if you not sure how to do it, post here .ini file and I can help you further.