Exporting to Media Encoder and file locating issue

ok, i've read lot of threads trying find solution none of them have answered problem exactly, here's have:

 

running new computer clean install of windows 7 64 bit , adobe cs4 master suite

 

hardware:

dell precision m6400

intel(r) core(tm)2 duo cpu  t9900 @ 3.06 ghz, 3.07 ghz

12.0 gb ram

 

premiere ran fine while, i've run problem try export media encoder , keep getting error:

 

"could not read source. please check if has moved or been deleted"  on , over

 

i have deleted imported media 1 @ time try , locate what's causing since wasn't doing before, no luck.  restarted program premiere project won't open.  task bar loads until 2/3 in , stops there indefinitely, i've left , came 2 hours later , hadn't moved.  tracked , found previous save open, still not export, still says "could not read source. please check if has moved or been deleted".  , update , save new file 1 not open either.

 

i've tried recompressing each video file format know works premiere still no difference. 

 

this problem has plagued workflow while , can't take anymore.  i've had restart clean project files try work around lose progress, , work around rendering premiere file through after effects hasn't worked either.  error there says "dynamic link server busy".

 

here's problem not:  not because uninstalled cs3 or other previous version, i've never had on computer.  it's not plugin problem, don't have plugins on install except default ones came adobe master suite premiere pro. 

 

someone please me, ridiculous have had trouble shoot program much.  both cs4 , windows 7 have been around on year , neither in beta editions

os, pr version, disk setup, etc.?

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