The Mali forward came off the bench to score once and set up another as the Hammers played out an eventful 3-3 draw against West Bromwich Albion on Saturday.
"I think overall there's not much wrong, perhaps a slight lacking in confidence," he said.
"The only solution is to work hard. Hard work and then, ultimately, we'll see how it goes. We'll carry on working hard and I believe it's just the small things that are missing right now - but we'll be OK.
"Every point is important and the most important thing on Saturday was not to lose. We've got to try to continue to play as we did in the second half."
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