Lookup

Hi,

I need a help on LookupSet

= Trim(Join(
LookupSet(Fields!JoinColumn.Value ,Fields!JoinColumn.Value,Fields!JoinColumnText.Value,"Dataset") ,vbcrlf))

I am using the code as above.Here JoinColumn is unique number column and joining based on this unique column.I have one scenaro where JoinColumnText will have the below values.                                                                                                                                                                                                                                                                                                     

JoinColumnText value as below  

This is Line1
This is Line2

Here first row is blank and it will not have any value.When i use the code as above it is not joining and not displaying the JoinColumnText data.Please help me how to overcome this scenario when there is empty row.