Problem with recording the guitar ,please help!!

hi folks,
 im owner of Sonar 8 Producer Edition and I did start working with it two weeks ago .
At the beginn I had same problem  but i could fix it like this :
There had been a regular dropout on my recordings and I coordinated the Bit-and Sampling-Options of my Via HD Audio Deck
(Windows Sound App. for my Soundcard) with the ones of Sonar and everything work fine.
The same Problem now seems to appear from nowhere and there is no possibility for me to solve this problem tried
nearly all changes in the Audio-Options which could be responsible for the spaced short breaks of my recorded Audio
that seems to appear in relationship of the intensity i play,when i play loud there are more dropouts as when i play gentle
but the dropouts are constand there even more when i play louder.
Any ideas ? Spent so much time to solve ......

Yes I tried the record and playback buffer size i don't think it's a problem about the settings because i tried nearly all size of buffer samle-rates etc.,maybe  a special combination...?!
System is high end,Win7-32Bit,latest drivers, the sound card is onboard called " VIA VT1708S "  supporting modes up to 192kHz ,24 Bit
 i also tried the whole palette of options outside Sonar which could affect to my recording and made them the same as in Sonar ,
the problem seems to appear while rendering because the amplitude of the short dropouts are not shown while recording,
they appear when i stop the record ,and I only hear them  during the record when i activate the input-echo button while using
the mic input , when i use  the line-in  input i can't hear the dropouts while recording with the activated input-echo -button
,The project size is empty and no junk  anymore-no change
i will upload some screens of my setting but i tried them all in Sonar and the problem still there

 i took a look at the instruction and some videos  and what you can find else and tried
but i did not tried yet to change some parameters in this script files mentioned in the manual
thats stupid there much possibility to do so but i don't think it's necessary becaus it did work!! 

when i record something Sonar will not drop me out of recording mode.You can hear regular" klick-klacks" on
 the recording when it's rendered and all the louder i play all the more klick klacks are there ,you know?
 

Well everything works fine now!
first programm crashes on every startup after changing the driver,
did backup and deleted all projects, reset to Mainsetting and use the MMe32 Driver,
Good evening and thanx for ya time and help!