pdflatex not working anymore after updating pdflatex.ini and initexmf --dump=pdflatex

I tried to overcome the well known tex capacity exceed problem, when using large Surf-plot with many datapoints.

I tried this by typing into the cmd (Windows 7, MikTex 2.9):

initexmf --edit-config-file=pdflatex 

main_memory=5000000 
extra_mem_bot=5000000 
font_mem_size=5000000 
pool_size=5000000 
buf_size=5000000 

**initexmf --dump=pdflatex** 

Now, pdflatex does not work anymore, a dvi is built, but no output.

The log also says that the system maybe just failed.
pdflatex is broke…
Any Ideas? (I cannot think of a proper MWE.)