diff --git a/src/main/java/org/gcube/portlets/user/dataminermanager/server/DownloadServlet.java b/src/main/java/org/gcube/portlets/user/dataminermanager/server/DownloadServlet.java
index 4491c91..32b8ef1 100644
--- a/src/main/java/org/gcube/portlets/user/dataminermanager/server/DownloadServlet.java
+++ b/src/main/java/org/gcube/portlets/user/dataminermanager/server/DownloadServlet.java
@@ -101,7 +101,7 @@ public class DownloadServlet extends HttpServlet {
 					String fileName;
 					if (itemDownload.getItemDescription() == null) {
 						fileName = "filename";
-						resp.setHeader("Content-Disposition:", "attachment;filename=\"" + fileName + "\"");
+						resp.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
 						resp.setHeader("Content-Type", "application/force-download");
 					} else {
 						if (itemDownload.getItemDescription().getName() == null
@@ -109,27 +109,29 @@ public class DownloadServlet extends HttpServlet {
 							if (itemDownload.getItemDescription().getType() != null && itemDownload.getItemDescription()
 									.getType().compareTo(FolderItem.class.getSimpleName()) == 0) {
 								fileName = "folder.zip";
-								resp.setHeader("Content-Disposition:", "attachment;filename=\"" + fileName + "\"");
+								resp.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
 								resp.setHeader("Content-Type", "application/zip");
 							} else {
 								fileName = "filename";
-								resp.setHeader("Content-Disposition:", "attachment;filename=\"" + fileName + "\"");
+								resp.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
 								resp.setHeader("Content-Type", "application/force-download");
 							}
 						} else {
 							if (itemDownload.getItemDescription().getType() != null && itemDownload.getItemDescription()
 									.getType().compareTo(FolderItem.class.getSimpleName()) == 0) {
 								fileName = itemDownload.getItemDescription().getName() + ".zip";
-								resp.setHeader("Content-Disposition:", "attachment;filename=\"" + fileName + "\"");
+								resp.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
 								resp.setHeader("Content-Type", "application/zip");
 
 							} else {
 								fileName = itemDownload.getItemDescription().getName();
-								resp.setHeader("Content-Disposition:", "attachment;filename=\"" + fileName + "\"");
+								resp.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
 								resp.setHeader("Content-Type", "application/force-download");
 							}
 						}
 					}
+					logger.debug("Content-Disposition: "+resp.getHeader("Content-Disposition"));
+					logger.debug("Content-Type: "+resp.getHeader("Content-Type"));
 					logger.debug("DownloadServlet filename: " + fileName);
 					stream(itemDownload.getInputStream(), resp.getOutputStream());
 				}