Can't retrieve text from <th> HTML tag

[lcluff2000]

This code:
Macro TimeCard

Code:

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HtmlDoc doc
doc.InitFromInternetExplorer(w)
s=doc.GetText("th" "grdTCardDtl_c_0_1")
out s

Gives me this error:
Error (RT) in TimeCard: object not found (container). ?

Even though the HTML code contains:
<th id='grdTCardDtl_c_0_1' columnNo='1' height='30px' class="ig_6a760250_r4 ig_6a760250_2"><nobr>Dist. Code</nobr></th>

Is there a way to get the text from a <th> tag using the id?