how to obtain mouse lncRNA?

[thejustpark]

I am trying to collect all available mouse (mm9) lncRNAs using UCSC genome browser.
I found that UCSC gene list includes some lncRNAs when I set the output format to be "all fields from selected table".
However, when I change it to "bed" or "gtf", all noncoding transcripts are gone.

What I want to have is their exon locations, which is not available in "all fields from selected table".
Do you guys know why are they gone when "bed" or "gtf" file is selected, and how can I obtain the information?

Above all, how do you guys collect mouse lncRNAs?

Thanks,
HJ.