attribute value matching

Here's a quikie:
MSFT Site Builder workshop on XSL pattern matching has the following
example for matching attributes:

Find all bookstores where the value of the specialty attribute is equal
to "textbooks":

/bookstore[@specialty = "textbooks"]

Why, then does my <xsl:value-of select="archdesc/dsc/.//c[@level =
"series"]/did/unittitle"/> return errors in IE5.0 regarding whitespace
ommission? Adding whitespcae at the required point results in an error
of "missing equals sign between attribute and attribute value".

much obliged,
--
Stephen Yearl, Project Archivist
     stephen_yearl@xxxxxxx
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Connecticut Historical Society
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1 Elizabeth Street
Hartford, CT 06105
(860) 236-5621
http://www.chs.org
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