diff --git a/addprinter.asp b/addprinter.asp
index 7bd8c03..216169c 100644
--- a/addprinter.asp
+++ b/addprinter.asp
@@ -328,10 +328,11 @@
           var machineOption = $('#machineid option:selected');
           var modelOption = $('#modelid option:selected');
 
-          var vendor = modelOption.data('vendor') || '';
-          var model = modelOption.data('model') || '';
-          var machineAlias = machineOption.data('alias') || '';
-          var machineNumber = machineOption.data('number') || '';
+          // Use attr() instead of data() for reliable reading
+          var vendor = modelOption.attr('data-vendor') || '';
+          var model = modelOption.attr('data-model') || '';
+          var machineAlias = machineOption.attr('data-alias') || '';
+          var machineNumber = machineOption.attr('data-number') || '';
 
           // Only generate if we have model AND (machine OR CSF name)
           if (!vendor || (!csfName && !machineAlias && !machineNumber)) {