Match Regular Expression not returning submatches.

I am having an issue with Match Regular Expression not returning the appropriate number of submatches.  My string is as follows:
DATAM    995000    1.75    0.007    -67.47    24.493    99.072
The spaces are tabs and the length is not fixed so simple string manipulation is out of the question.  The regular expression I was trying is as follows:
(?<=\t)[0-9\.\-]*(?=(\t|$))
It successfully returns Whole Match as the first number but no submatches are returned.  I've tried simpler expressions which work in Matlab and EditPad Pro such as [0-9.-]* but never got the same answer in Labview.
What is going on?

Here is an image of the VI.  The top portion is the input from our Licor 7000.  The bottom portion is the bit of code I'm having problems with.
Attachments:
matchregularexpression.jpg ‏336 KB

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    inuyasha84 wrote:
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