I forgot that new forgegradle doesn't work on older versions. :-(

build.gradle

@@ -11,7 +11,6 @@ buildscript {
     }
 }
 
-apply plugin: 'curseforge'
 apply plugin: 'forge'
 
 version = "1.3.2"
@@ -22,13 +21,6 @@ minecraft {
 	version = "1.6.4-9.11.1.964"
 }
 
-curse {
-    apiKey = project.curseforge_key
-    projectId = "72733"
-    changelog = "Fixed dedicated server crash and issue with saving & loading metadata"
-    releaseType = "release"
-}
-
 processResources
 {
     // this will ensure that this task is redone when the versions change.
@@ -47,4 +39,4 @@ processResources
     from(sourceSets.main.resources.srcDirs) {
         exclude 'mcmod.info'
     }
-}
+}