diff --git a/deploy-chunked-simple.sh b/deploy-chunked-simple.sh
index aa2c399..db9e120 100644
--- a/deploy-chunked-simple.sh
+++ b/deploy-chunked-simple.sh
@@ -205,6 +205,13 @@ upload_file_in_chunks() {
   for chunk_file in "$temp_dir"/chunk_*; do
     printf "  Chunk %3d/%3d... " "$((chunk_index + 1))" "$total_chunks"
 
+    if [ "$DEBUG_MODE" = "true" ]; then
+      echo ""
+      echo "DEBUG: SESSION_ID='$SESSION_ID'"
+      echo "DEBUG: Uploading to: $API_BASE/upload/chunk"
+    fi
+
+    # Send all params as form fields with the multipart file
     RESPONSE=$(curl -s -X POST "$API_BASE/upload/chunk" \
       -F "uploadSessionId=$SESSION_ID" \
       -F "fileType=$file_type" \
@@ -213,11 +220,20 @@ upload_file_in_chunks() {
       -F "fileName=$file_name" \
       -F "chunk=@$chunk_file")
 
+    if [ "$DEBUG_MODE" = "true" ]; then
+      echo "DEBUG: Chunk response: $RESPONSE"
+    fi
+
     SUCCESS=$(echo "$RESPONSE" | grep -o '"success":[^,}]*' | cut -d':' -f2)
 
     if [ "$SUCCESS" != "true" ]; then
       echo -e "${RED}FAILED${NC}"
       log_error "Failed to upload chunk $((chunk_index + 1))/$total_chunks"
+      echo "DEBUG: SESSION_ID='$SESSION_ID'"
+      echo "DEBUG: fileType='$file_type'"
+      echo "DEBUG: chunkIndex='$chunk_index'"
+      echo "DEBUG: totalChunks='$total_chunks'"
+      echo "DEBUG: fileName='$file_name'"
       echo "$RESPONSE"
       rm -rf "$temp_dir"
       exit 1