If statement not working?

Hey guys,

I have a if/else statement which works on the first 2 criteria in green (150mm Adjustment and 100mm Adjustment), but fails on the last when no criteria has been met. I must be missing something very simple. Can anybody help me please? It will be greatly appreciated. Please see below.

/////////////////////////////////////////////////////////////////////
// 150mm Adjustment
/////////////////////////////////////////////////////////////////////
if(input.ctwSampleDimensions = "150")
{
   if(spl.sampleGNGResult = "Fail" && spl.sampleGNGFailProcessing = "Complete")
   {
        if(spl.stage2Result = "Fail")
        {
            if(spl.sampleGNGReportHold = "Hold")
            {
                if(spl.sizeCheckSubform.stage1Result = "Fail")
                {
                    spl.stage2MaxLoadRpt=input.stage2MaxLoadRpt;
                    spl.stage2FailingLoadRpt=input.stage2FailingLoadRpt;
                    spl.stage2AverageArea=input.stage2AverageArea;
                    spl.stage2MaxLoadAdjusted=input.stage2AdjustedMaxLoad;
                    spl.stage2CompressiveLoadAdjusted=input.stage2AdjustedCompressiveStrength;
                    spl.stage2MaxLoadOriginal=input.stage2MaxLoadOriginal;
                    spl.stage2FailingLoadOriginal=input.stage2FailingLoadOriginal;
                    spl.sampleGNGReportHold="Complete";
                }
            }
        }
   }
}
/////////////////////////////////////////////////////////////////////
// 100mm Adjustment
/////////////////////////////////////////////////////////////////////
else if(input.ctwSampleDimensions = "100")
{
   if(spl.sampleGNGResult = "Fail" && spl.sampleGNGFailProcessing = "Complete")
   {
        if(spl.stage2Result = "Fail")
        {
            if(spl.sampleGNGReportHold = "Hold")
            {
                if(spl.sizeCheckSubform.stage1Result = "Fail")
                {
                    spl.stage2MaxLoadRpt=input.stage2MaxLoadRpt;
                    spl.stage2FailingLoadRpt=input.stage2FailingLoadRpt;
                    spl.stage2AverageArea=input.stage2AverageArea;
                    spl.stage2MaxLoadAdjusted=input.stage2AdjustedMaxLoad;
                    spl.stage2CompressiveLoadAdjusted=input.stage2AdjustedCompressiveStrength;
                    spl.stage2MaxLoadOriginal=input.stage2MaxLoadOriginal;
                    spl.stage2FailingLoadOriginal=input.stage2FailingLoadOriginal;
                    spl.sampleGNGReportHold="Complete";
                }
            }
        }
   }
}
// Below doesn't execute
spl.stage2MaxLoadRpt=input.stage2MaxLoadRpt;
spl.stage2FailingLoadRpt=input.stage2FailingLoadRpt;