Pronterface won't start printing

I'm new to reprap. I just finnished assembling my Prusa Mendel I2, and was able to get some prints. Sometimes I wasn't able to start a print but I was able to solve the problem by closing and re-opening pronterface. This time I'm not able to solve my problem. When I start the print this shows:
T:202.0 E:0 W
T:201.6 E:0 W
T:201.1 E:0 W
T:200.8 E:0 W:9
T:200.3 E:0 W:8
T:200.0 E:0 W:7
T:199.6 E:0 W:6
T:199.2 E:0 W:5
T:199.0 E:0 W:4
T:198.7 E:0 W:3
T:198.3 E:0 W:2
T:198.0 E:0 W:1
T:197.6 E:0 W:0
When W:0, print is supposed to start, but in this case it doesn't. What's wrong?

Probably your hotend temperature.
What temperature did you have set?
In any case it was constantly reducing the temperature from 202.0 down to 197.6!

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Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

I have a similar problem, when I try to do a print I get the same thing as you, only I have my temp manually set at 240, when I press print it will do what your getting till it drops down to 200 degrees then it starts. I'm assuming I'm setting up my temp wrong in slicer and the read outs showing the temp drop is the printer taking itself to the determined temp for the print, try and double check your temp settings and also make sure your first layer temp is high enough.

Best of luck, ash

Try setting the temps in "Filament settings" (Slic3r) to zero -bed and hotend, i.e. zero in all 4 boxes.
Slice your model, set your temps in Pronterface manually then hit "print"

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_______________________________________
Waitaki 3D Printer

Also verify what is in your START gcode for commands (if any).

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Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

I tried setting my temperatures as 0 on slic3r but this came up after I attempted a print:
Print Started at: 20:02:51
Error:0
: Extruder switched off. MINTEMP triggered !
Errorrinter stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)

I

Looks like you need to look at the firmware and see what your "Mintemp" is set at.

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_______________________________________
Waitaki 3D Printer

'I am newer in this field, i loaded gcode in pronterface but when i hit print button i did not work printer did not move a single step. reading of pronterface is as blew.
T:230.00 E:0 B:66.9
T:229.94 E:0 B:66.9
T:229.94 E:0 B:67.0
T:230.00 E:0 B:67.1
T:230.06 E:0 B:67.2
T:230.00 E:0 B:67.2
T:230.00 E:0 B:67.2
T:230.06 E:0 B:67.4
i did not understand what is that ?
is any one help me.

Your printer is just showing temperatures

T:230.00 E:0 B:66.9
...
T:230.06 E:0 B:67.4

I would guess that its still waiting for the bed to reach temperature since its still climbing