I only quoted the paragraphs that focus on March fundraising estimates, but the article covers her perceived financial problems.  Further down:

Word of Obama's latest financial benchmark comes amid continued reports that the Clinton campaign is struggling with a persistent debt that at times has reached nearly $9 million, according to published reports and Democratic party officials. The size of Clinton's debt, in turn, has given rise to questions about whether she will have the cash to compete head to head with Obama in various primaries in the final eight weeks of the nomination campaign.

Sen. Clinton loaned herself $5 million earlier this year when her campaign stumbled, fundraising slowed and her cash on hand dwindled. There have been scattered reports in recent weeks that various campaign vendors have not been paid for work or services that have already been rendered, with some taking to the airwaves to complain.

Debt is not uncommon in presidential campaigns, and often is carried quietly on a campaign treasurer's books for a few weeks. Creditors go unpaid, staffers can work for free; small costs can even be borne on personal credit cards for a brief period of time. These and other tactics are almost always employed at one time or another by most presidential operations to get through tight spots. But the debts tend to be short-lived and modest, rarely exceeding a few million dollars. While the exact size of Clinton's debt has fluctuated, Democratic party officials say, hers' remains above the norm in size for a campaign at this stage of a race.