who can help me to settle the following errors ?

**Error** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerImageArea.as: Line 159: Left side of assignment operator must be variable or property.
             mThumbArea.__set__selectedThumbIndex(++mThumbArea.__get__selectedThumbIndex());

**Error** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerImageArea.as: Line 163: Left side of assignment operator must be variable or property.
             mThumbArea.__set__selectedThumbIndex(--mThumbArea.__get__selectedThumbIndex());

**Error** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerThumbArea.as: Line 182: Left side of assignment operator must be variable or property.
                 this.__set__selectedThumbIndex(++this.__get__selectedThumbIndex());

**Error** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerThumbArea.as: Line 213: Left side of assignment operator must be variable or property.
                 this.__set__selectedThumbIndex(--this.__get__selectedThumbIndex());

**Error** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerThumbArea.as: Line 217: Left side of assignment operator must be variable or property.
                 this.__set__selectedThumbIndex(++this.__get__selectedThumbIndex());

**Warning** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerThumb.as: Line 7: There is no class or package with the name 'com.airtightinteractive.apps.viewers.simpleViewer.ThumbArea' found in package 'com.airtightinteractive.apps.viewers.simpleViewer'.
             mThumbArea = com.airtightinteractive.apps.viewers.simpleViewer.ThumbArea.getInstance();

**Warning** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerThumb.as: Line 8: There is no class or package with the name 'com.airtightinteractive.apps.viewers.simpleViewer.ImageArea' found in package 'com.airtightinteractive.apps.viewers.simpleViewer'.
             mImageArea = com.airtightinteractive.apps.viewers.simpleViewer.ImageArea.getInstance();

**Warning** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerStageManager.as: Line 19: There is no class or package with the name 'com.airtightinteractive.apps.viewers.simpleViewer.ThumbArea' found in package 'com.airtightinteractive.apps.viewers.simpleViewer'.
             mThumbArea = com.airtightinteractive.apps.viewers.simpleViewer.ThumbArea.getInstance();

**Warning** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerStageManager.as: Line 20: There is no class or package with the name 'com.airtightinteractive.apps.viewers.simpleViewer.ImageArea' found in package 'com.airtightinteractive.apps.viewers.simpleViewer'.
             mImageArea = com.airtightinteractive.apps.viewers.simpleViewer.ImageArea.getInstance();

**Warning** C:simpleviewercomairtightinteractiveappsviewerssimpleViewerXMLManager.as: Line 8: There is no class or package with the name 'com.airtightinteractive.apps.viewers.simpleViewer.ThumbArea' found in package 'com.airtightinteractive.apps.viewers.simpleViewer'.
             mThumbArea = com.airtightinteractive.apps.viewers.simpleViewer.ThumbArea.getInstance();

Total ActionScript Errors: 10      Reported Errors: 10

Loaded XML: true