This is likely related to Sonar 6.2's X-Ray feature. We've found that this occurs when X-Ray is enabled, and only under Windows XP (under Vista, the GUI should open normally and interact with the X-Ray feature as expected). We're working with Cakewalk to resolve this, but in the meantime you can exclude Ethno from the X-Ray feature by doing one of the following: 


1.) Launch Sonar, go to Options > Global, and click on the General tab. At the bottom, disable X-Ray. This is the easiest and quickest method, but it will disable X-Ray for all plug-ins. 


2.) Exclude only Ethno Instrument from using X-Ray. To do this, you'll need to follow these steps to edit the XRayExclude.ini file. 


- Go to C:\Documents and Settings\user name\Application Data\Cakewalk\Sonar 6 Producer Edition (replace C with the letter of your XP startup drive, and user name with your login account's user name). 
- Open XRayExclude.ini in Notepad 
- You'll see entries like this: 


; Waves Stomp 6 Stereo
XRayExclude10={E3B000C2-6C44-4A23-A9A7-3F2C0052A010}


- Go to the end of the file and add a similar line for Ethno Instrument: 


; MOTU Ethno Instrument
XRayExclude13={B7EC1903-F699-45CA-8D2E-43C6402C14DE}
XRayExclude14=11163151438 


- Note that the number for each line needs a unique number, such as XRayExclude13, XRayExclude14, etc. Look through the file and find the highest number, then start with the next value. 
- The value on each line is the plug-in ID, one each for the DXi and the VST. To find the plug-in ID, launch Sonar, go to Tools > Cakewalk Plug-in Manager and locate the DXi and VSTi versions of Ethno Instrument. 
- Save this file, then re-open Sonar. 




Using either method, the GUI should appear now, and when X-Ray is enabled the Ethno Instrument GUI will not become transparent.