Not Rendering As Seen

The higher the resolution of renders...the more loss of lighting effects...until the image renders as Matt at about 5000 x 5000 ppi and above... Also, renders are constantly being hung up, stopped, and won't finish with the "Bad Allocation" errors at this resolution and above... The higher the resolution, renders won't even start at all...

I NEED THIS PROGRAM TO RENDER IMAGES EXACTLY HOW THEY ARE SEEN ON MY HD DISPLAY...AND FOR THIS PROGRAM TO BE STABLE IN RENDERING HIGH RESOLUTION IMAGES WITHOUT BEING CONTINUOUSLY HUNG UP AND STOPPED WITH "BAD ALLOCATION" ERRORS!!!

...and yes...I'm not happy...I have work that I'm trying to complete...and these problems are royally screwing it up and wasting my time... Up to version 4.0 and stuff like this is happening??? Drop everything else to try and justify another version for sales...and stabilize the program...

Sorry for the vent...but I'm having to go all the way down to a 1000 x 1000 render to get any surface result to look like the display image...then try to increase resolution in PS for printing...and not even close to the resolution quality I should have if FF was rendering correctly...