Problem in Installing QNX on a Compact Flash

Dear All,
I am a first time user of this forum and has a problem installing QNX… i hv visted other posts but culdnt find the solution…
I have installed QNX 6.2.1a from a CD onto a Kingston Compact Flash of 2GB capacity which is conencted as secondary master…
here during installing from the CD, all files required are copid and system is restarted after CD removal…
on reboot, after sometime it is showing a message…
/.diskroot not found on the file system…
Safe mode, Unable to locate /fs-pkg

why this problem is coming… i has even trid on a 1GB CF flash… the problem remains the same…
when i tried installing onto a older (around1year old) CF flash. it is getting installed and booted successfully …
Any solution plz suggest…
thanx