<DOCUMENT>
<TYPE>EX-99.77K CHNG ACCNT
<SEQUENCE>8
<FILENAME>k77.txt
<TEXT>



dateYear2007Day27Month7lstransJuly 27, 2007

Securities and Exchange Commission
addressStreet100 F Street, N.E.
placeCityWashington, StateDC PostalCode20549

Commissioners:

We have read the statements made by MFS Investment Grade Municipal Trust
 (the "Fund", formerly known as Colonial Investment Grade
Municipal Trust) (copy attached), which we understand will be filed with
the Securities and Exchange Commission, pursuant to Item 77K
of Form N-SAR, as part of the Fund's Form N-SAR report for the period
ended datelstransMonth5Day31Year2007May 31, 2007.  We agree
with the statements concerning our Firm in such Form N-SAR.


Very truly yours,



PricewaterhouseCoopers LLP



On datelstransMonth6Day29Year2007June 29, 2007, PricewaterhouseCoopers LLP
(PwC) resigned as the independent registered public
accounting firm for the Trust. During the two most recent fiscal years, PwCs
 audit reports contained no adverse opinion or
disclaimer of opinion; nor were its reports qualified or modified as to
uncertainty, audit scope, or accounting principles. Further,
in connection with its audits for the two most recent fiscal years and
through datelstransMonth6Day29Year2007June 29, 2007, there
were no disagreements between the Trust and PwC on any matter of accounting
 principles or practices, financial statement disclosure
or auditing scope or procedure, which, if not resolved to the satisfaction
of PwC, would have caused it to make reference to the
subject matter of the disagreement in its report on the financial statements
 for such years.  Effective
datelstransMonth6Day29Year2007June 29, 2007, Ernst & Young LLP was appointed
 by the audit committee of the Board of Trustees as the
independent registered public accounting firm of the Trust for the fiscal
 year ended datelstransMonth11Day30Year2007November 30, 2007.


</TEXT>
</DOCUMENT>
