SASS IE Filter problem

IEFilters.css

/* 
   The filter property below is causing a parse error.
*/
.push-status.cancelled .progress {
	filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#00E85734', EndColorStr='#00E85734');
}

/* When I ran it I got this (keep reading to see my solution */

/* An error occurred while compiling the Sass file.  Details:

System.MissingMethodException: undefined method `chr' for "(":String
   at ℑℜ:_to_tree:303:177:C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Mindscape\Mindscape Web Workbench\1.0.161.18005\CustomTool\Sass\sass\lib/sass/../sass/engine.rb(Closure , Object , Proc )
   at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet](T0 arg0, T1 arg1)
   at IronRuby.Runtime.Calls.RubyObjectMethodDispatcherWithScope.Invoke[TScope](CallSite callSite, TScope scope, Object self)
   at ℑℜ:_render:290:176:C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Mindscape\Mindscape Web Workbench\1.0.161.18005\CustomTool\Sass\sass\lib/sass/../sass/engine.rb(Closure , Object , Proc )
   at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet](T0 arg0, T1 arg1)
   at IronRuby.Runtime.Calls.RubyObjectMethodDispatcherWithScope.Invoke[TScope](CallSite callSite, TScope scope, Object self)
   at ℑℜ:render:237:174:C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Mindscape\Mindscape Web Workbench\1.0.161.18005\CustomTool\Sass\sass\lib/sass/../sass/engine.rb(Closure , Object , Proc )
   at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet](T0 arg0, T1 arg1)
   at IronRuby.Runtime.Calls.RubyObjectMethodDispatcherWithScope.Invoke[TScope](CallSite callSite, TScope scope, Object self)
   at ℑℜ:compile:30:165:C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\10.0\Extensions\Mindscape\Mindscape Web Workbench\1.0.161.18005\CustomTool\Sass\sass\lib\sass.rb(Closure , Object , Proc , Object , Object )
   at Microsoft.Scripting.Interpreter.LightLambda.Run4[T0,T1,T2,T3,TRet](T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at System.Dynamic.UpdateDelegates.UpdateAndExecute4[T0,T1,T2,T3,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3)
   at Microsoft.Scripting.Interpreter.DynamicInstruction`5.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame)
   at Microsoft.Scripting.Interpreter.LightLambda.Run2[T0,T1,TRet](T0 arg0, T1 arg1)
   at IronRuby.Runtime.RubyScriptCode.Run(Scope scope, Boolean bindGlobals)
   at IronRuby.Runtime.RubyScriptCode.Run(Scope scope)
   at Microsoft.Scripting.SourceUnit.Execute(Scope scope, ErrorSink errorSink)
   at Microsoft.Scripting.Hosting.ScriptSource.Execute(ScriptScope scope)
   at Microsoft.Scripting.Hosting.ScriptEngine.Execute(String expression, ScriptScope scope)
   at Mindscape.VisualSass.Integration.CustomTool.ScssGenerator.Compile(String scss)
*/



/* It took me a while to find the problem since there was no line number and the error 
message wasn't helpful.  I ran the same scss in Sass 3.1.4 via command line/Ruby and 
it ran fine.  To solve it I quoted the whole value and then used the unquote method: */

.push-status.cancelled .progress {
	filter: unquote("progid:DXImageTransform.Microsoft.gradient(startColorStr='#00E85734', EndColorStr='#00E85734')");
}