Proteus Stimulation Not Working

Hi all.
I am using Proteus 8.2 for stimulation. it was working fine. but due to my PC problems i had to uninstall the proteus and then i installed it again.
My problem is after installtion i am not able to stimulate any of my files which i used to do it before. i even does not stimulates a single LED. it give's me an error like
Pin 'K' is not modelled. [D7]
Pin 'A' is not modelled. [D6]

i have even checked that not even the DC motor is working....
please help me out of this...

Error page attached.

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i have tried reinstalling 4 to 5 times....
but the things are not working perfect.

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Make sure you are using models that can simulate. Some schematic symbols have no simulation models attached. There may be a net-list conflict. Check and see if the expected nodes are not 1 & 2 instead of A & K.

The same models were stimulating earlier... but due to some problem in my PC i uninstalled my Proteus and reinstalled it... after reinstalling its not working.

Before installing proteus again, you have to clean each and every trace of Proteus from your Registry, otherwise it can give you such errors. Use "jv16" PC Utility tool to clean registry and after that installation works fine. You can try cleaning your registry.

Try do as as new project

i have even tried doing a new project in which i have used only one LEd connecting to VCC and GND and tried running the project. i am getting an error like
Cannot find model file 'LEDA.MDF'.
Pin 'K' is not modelled. [D1]
Pin 'A' is not modelled. [D1]
Simulation FAILED due to netlist linker error(s).

and also tried running JV16 as xpress_embedo said to do so...
but still the problem has not yet solved.
infact the problem has rise to a new level. when i try to make a new component by clicking on a design and select MAKE DEVICE option, it again gives me an error that the libraries are read only and cannot make a device. (ERROR PHOTO ATTACHED)
so what i have done is gone to library manager and then selected CREATE LIBRARY,
but still dont understand how to overcome this issue of libraries.

upload your proteus file ., may i check it ?