2 Mambo image upload problems

I have 2 problems with mambo 4.5.3 : The first problem is the most urgent, you can find the description here: [login to view URL],com_joomlaboard/Itemid,38/func,view/catid,20/id,3534/#3534 For the second problem, I need to replace the default image upload (where a user can upload files or select all files from a whole directory (see screenshot) needs to be replaced by just a simple upload field without anything else. Please note that the first problem meight be an issue with permissions, ... and this is on an IIS server; So I need someone who has experience with this and with connecting through MSTSC.