There had been no sign of progress under new leader Kim Jong-un, she said.
North Korean media coverage of Kim Jong-un has passed through several stages since December.
And how do you know if you can trust anything coming from Kim Jong-un?
What do Ben Bernanke, Zhang Xin, Kim Jong-un and Bugs Bunny have in common?
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Kim Jong-un is already showing a different public personality than that of his father.
Ms Ri watched a football match in the capital, Pyongyang, with Kim Jong-un, state-run KCNA said.
Kim Jong-un (No. 44) replaced his father as supreme leader of North Korea in late 2011.
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North Korean leader Kim Jong-un marked the occasion with a visit to his grandfather's mausoleum, KCNA says.
State media said Kim Jong-un visited the body of his father on Tuesday to pay his respects.
Kim Jong-un was promoted to top political and military positions at a rare party meeting last month.
North Korea has conducted two long-range rocket launches since Kim Jong-un came to power in December 2011.
Activists say North Korean leader Kim Jong-Un is taking stronger measures to prevent people from trying to leave.
Kim Jong-un took over as leader of North Korea after his father Kim Jong-il died in December 2011.
North Korea's leader Kim Jong-il has appeared at national celebrations with his son and heir apparent Kim Jong-un.
BBC: North Korea leader Kim Jong-il appears with Kim Jong-un
Jong-Il died just over a year ago, and his son, 29-year-old Kim Jong-un, assumed control of the country.
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North Korea leader Kim Jong-un, who oversaw the country's recent nuclear test, is known to be a basketball fan.
The message, which stretches for more than 1, 800 ft (548m), reads "Long Live General Kim Jong-un, the Shining Sun!"
As with his predecessors, North Korean state media has portrayed Kim Jong-un as a young man with extraordinary capabilities.
Internet use is highly restricted there although leader Kim Jong-un has called for a push in technology and science.
His page contained posts insulting his half-brother, Kim Jong-un, his father's chosen successor.
The only other option for Kim Jong-Il would be his youngest, Kim Jong-Un.
The country recently celebrated the 101st anniversary of the birth of Kim Il-Sung, who was the grandfather of Kim Jong-Un.
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North Korean leader Kim Jong-un was educated for several years under a pseudonym in traditionally neutral Switzerland, Swiss media say.
North Korea has hailed late leader Kim Jong-il's son, Kim Jong-un, as "supreme leader of the party, state and army".
Protesters in South Korea's capital, Seoul, burned portraits of Kim Jong-un, his father Kim Jong-il, and grandfather Kim Il-sung on Monday.
However, it is believed this is restricted to just a few dozen families - most directly related to Kim Jong-un himself.
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Kim Jong-un took over as leader of North Korea after the death of his father Kim Jong-il in December last year.
Kim Jong-il had designated Kim Jong-un as his official successor, and at this time we have no indication that that has changed.
Meanwhile a video appeared on the regime's YouTube channel, depicting heir-apparent Kim Jong-un driving his sports car into women and children.
State TV showed Kim Jong-un surrounded by top government and army officials.
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