diff --git a/v2/network/session.go b/v2/network/session.go
index 2609e88..89b8617 100755
--- a/v2/network/session.go
+++ b/v2/network/session.go
@@ -1876,8 +1876,8 @@ func (session *Session) GetFixedClr() ([]byte, error) {
 	}
 	var size int
 	switch nb {
-	case 0:
-		size = 0
+	case 0, 0xFD, 0xFF:
+		return nil, nil
 	case 0xFE:
 		size, err = session.GetInt(4, false, true)
 		if err != nil {
@@ -1886,9 +1886,6 @@ func (session *Session) GetFixedClr() ([]byte, error) {
 	default:
 		size = int(nb)
 	}
-	if size == 0 {
-		return nil, nil
-	}
 	return session.GetBytes(size)
 }
 func (session *Session) WriteFixedClr(buffer *bytes.Buffer, data []byte) {
diff --git a/v2/parameter.go b/v2/parameter.go
index 49df963..b636b1b 100644
--- a/v2/parameter.go
+++ b/v2/parameter.go
@@ -518,12 +518,14 @@ func (par *ParameterInfo) decodePrimValue(conn *Connection, temporaryLobs *[][]b
 		return nil
 	}
 	if udt { /*special extraction of udt fields*/
-		switch par.DataType {
-		case NCHAR, CHAR, LONG, LongVarChar:
-			par.BValue, err = session.GetFixedClr()
-		default:
-			par.BValue, err = session.GetClr()
-		}
+		//switch par.DataType {
+		//case NCHAR, CHAR, LONG, LongVarChar:
+		//	par.BValue, err = session.GetFixedClr()
+		//	//par.BValue, err = session.GetClr()
+		//default:
+		//	par.BValue, err = session.GetClr()
+		//}
+		par.BValue, err = session.GetFixedClr()
 	} else {
 		par.BValue, err = session.GetClr()
 	}
@@ -649,7 +651,6 @@ func (par *ParameterInfo) decodePrimValue(conn *Connection, temporaryLobs *[][]b
 			locator, err = session.GetClr()
 		} else {
 			locator = par.BValue
-
 		}
 		if err != nil {
 			return err
diff --git a/v2/parameter_encode.go b/v2/parameter_encode.go
index 5471109..130cb13 100644
--- a/v2/parameter_encode.go
+++ b/v2/parameter_encode.go
@@ -498,10 +498,11 @@ func (par *ParameterInfo) encodePrimValue(conn *Connection) error {
 					} else {
 						objectBuffer.Write(attrib.BValue)
 					}
-				case NCHAR, CHAR, LONG, LongVarChar:
-					session.WriteFixedClr(&objectBuffer, attrib.BValue)
+				//case NCHAR, CHAR, LONG, LongVarChar:
+				//	session.WriteFixedClr(&objectBuffer, attrib.BValue)
 				default:
-					session.WriteClr(&objectBuffer, attrib.BValue)
+					session.WriteFixedClr(&objectBuffer, attrib.BValue)
+					//session.WriteClr(&objectBuffer, attrib.BValue)
 				}
 			}
 			if par.parent == nil {