NOT ABLE TO UPGRADE SOFTWARE

[abuawab]

Hello guys
I'm one of many who benefited greatly from this forum , I've been reading and learning for the last few weeks
I faced a problem and i want your help if possible
I bought a 2005/2006 X5 (e53) 4.8is GCC specifications with everything possible as an option including professional navigation system .
I was fascinated with the ( 3D PERSPECTIVE ) View that i saw in this forum and in other forums too , i reviewed many sites to obtain this feature and came into conclusion that it is possible only after upgrading the navigation software .
Long story short , my navigation software is 4-1/50 , which ( i think ) means that i have
1- MKIV ( it reads DVD for sure )
2- V 25 software
So i downloaded the v29 , v29i , v32 , v32 with night mode and tried upgrading myself .
The upgrade FAILED every time
The messages i had were
1- error : can't read map CD/DVD ( although i was using the software CD/DVD )
2- No Map CD/DVD found .

I tried using CD or DVD , used ImgBurn and UltraISO , Used X1 speed and MAX speed, upgraded with system running or started from ignition OFF but never managed to get the upgrade software to load .
NOW
- what is wrong ?
- why can't i do something that everybody makes it sound as an easy job ?
- do i need to upgrade to another version before ?
- are there any DETAILED steps that i should follow?

I'll appreciate your reply
cheers from Bahrain