Question: Won't solve properly...has error

> m1 := 1000;
                              1000
> m2 := 250;
                              250
> m1A := .2;
                              0.2
> m2A := .62;
                              0.62
> m4A := .15;
                              0.15
> m5A := 0.5e-2;
                             0.005
> m1B := .3;
                              0.3
> m2B := 0.5e-1;
                              0.05
> m4B := .8;
                              0.8
> m1C := .5;
                              0.5
> dm1 := m1-m2-m3;
                            750 - m3
> dm1A := m1A-m2A-m3A;
                          -0.42 - m3A
> dm1B := m1B-m2B-m3B;
                           0.25 - m3B
> dm1C := m1C-m2C-m3C;
                        0.5 - m2C - m3C
> mf2 := 1 = m2*(m2A+m2B+m2C);
                      1 = 167.50 + 250 m2C
> mf3 := 1 = m3*(m3A+m3B+m3C);
                    1 = m3 (m3A + m3B + m3C)
> mf4 := 1 = m4*(m4A+m4B+m3C);
                      1 = m4 (0.95 + m3C)
> mf5 := 1 = m5*(m5A+m5B+m5C);
                   1 = m5 (0.005 + m5B + m5C)
> dm2 := m3-m4-m5;
                          m3 - m4 - m5
> dm2A := m3A-m4A-m5A;
                          m3A - 0.155
> dm2B := m3B-m4B-m5B;
                        m3B - 0.8 - m5B
> dm2C := m3C-m4C-m5C;
                        m3C - m4C - m5C
> solve({dm1, dm2, mf2, mf3, mf4, mf5, dm1A, dm1B, dm1C, dm2A, dm2B, dm2C}, {m2C, m3, m3A, m3B, m3C, m4, m4C, m5, m5B, m5C});