The 29-year-old singer, who married rocker Kroeger, 39, last year, is upset with him as the album on which they collaborated did not work, reported E! Online.
"When they met, they were in work mode. They were doing a collaboration and that's where the attraction stemmed from. She was also coming off some bad relationships where she didn't really feel appreciated as an artist. She felt she and Chad connected on that level.
"But the album didn't do as well as they had hoped... they're finding that they're not seeing eye to eye on a lot of things," a source said.