Keyboard sound is recorded only on single left channel!!

I have been using SONAR LE 8.5 for a while now. I received it with my Roland Juno Gi. I have this problem while recording. When I plug in my keyboard in the line-in (blue)channel, only the left track gets recorded and the right track remains blank. I've tried everything in vain. I just can't get it to record on stereo mode. I never had this problem when I was using Audacity. It automatically recorded in stereo mode. Can someone help me in this regard? Can I get it to record in stereo mode, or am I going to be stuck with the Left mono recording. Any help is much appreciated. Thanks in advance.

Hi there. Thank you so much for replying to my thread. Ok I’ll try to explain my problem a little more elaborately. Firstly, my computer specs: M/B: MSI Z77A GD65 CPU: Intel core i5 3570k HDD: WD caviar blue 500gb I don’t have a dedicated sound card, so I’m using the integrated one and it runs on Realtek high definition audio drivers. The blue channel I was referring to is actually and audio input channel on my motherboard where all most musical instruments are connected. Regarding my Juno Gi, I think it has these ouputs: Left/mono, Right, Headphones. Since there is only one input channel on my motherboard, I can use only either the left/mono out or headphones out from my keyboard. When I start recording the music that I play on my keyboard, it keeps getting recorded only on the left side of the stereo track in Sonar LE 8.5. The right track remains blank!! Previously, when I was using audacity software to record music, it used to record simultaneously on both tracks in stereo mode. However, in Sonar I find it disappointing that I have to record as left/mono channel. Mono channels are used only for mics, guitars, and other instruments which cannot emit stereo/dual channel signals. Since a keyboard emits dual channel signals, I’m surprised that the software cannot pick it up. Am I doing something wrong here or is the software itself having these problems? I currently record using the MME 32bit drivers. I tried ASIO, WDM and one other one that was available in the options but when I recorded music using these other drivers, I kept getting a distorting clicking noise in my tracks. So I have to stick to MME drivers. Oh, and one more thing, I thought the USB port was only meant to be used for MIDI, I don’t think it supports transfer of music played on the keyboard to the computer. I may be wrong, but please let me know if it works. I would really appreciate it if someone could help me in this area. I’m willing to provide any further information in this matter if it helps. Thanks in advance.

Welcome to the forum.
If youre recording from the Left/Mono output, you need to select the Left input in the SONAR track you're recording to. If you use a stereo input with a mono instrument (or output, as in this case) it will only record on the left side regardless of whether you've selected a stereo input in SONAR.
Most keyboards these days do output in stereo, but it's not absolutely necessary.
But, if you want to take advantage of the stereo capabilities of your keyboard, you'll need a cord to plug into the L/R outputs of the keyboard and the single, 3.5 mm (1/8") stereo input of your sound card. Then you can choose a stereo input in SONAR and the L and R will get recorded. Or the L in one track and the R in another track.
 
Since the Juno Gi is an audio interface, you need to visit the Roland web site and download the latest drivers for it and your operating system so that you can use the superior ASIO drivers for better recording satisfaction, and record the audio directly from the keyboard, too. Connect all microphones, guitars, speakers, headphones, etc. to the Juno.